All the fear, isolation, and disruption to their normal lives has also had a very negative psychological impact on kids. I've seen many who are clearly developing phobias and anxiety issues. The rare and hypothetical long term risks of covid to children (and the mild risks to vaccinated adults) need to be balanced against these ubiquitous and very
non-hypothetical adverse psychological effects. On a population level, I believe the evidence points to there being far more risk in the latter.
A society that sacrifices the psychological wellbeing of its children to prevent moderate illness in adults has really screwed up its priorities, and that's increasingly the situation in places where the most at-risk have been vaccinated.